Costar Group, Inc.
CSGP- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- SEC CIK
- 0001057352
In the last 90 days, Costar Group, Inc. insiders filed 1 open-market purchase and 2 sales; 760 institutions reported holding it in 13F filings for Q2 2026, worth $11.7B in total; superinvestors Akre Capital Management and Weitz Investment Management hold it.
13F holders, Q1 2026
Institutional positions in Costar Group, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 797
- −34 vs. Q4 2025
- Shares held
- 415.9M
- +73.3M (+21.4%) vs. Q4 2025
- Total value
- $16.8B
- −$6.24B (−27.1%) vs. Q4 2025
- New holders
- 130
- 308 more added
- Sold out
- 164
- 276 more reduced
16 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting CSGP on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 760 | $11.7B |
| Q1 2026 | 797 | $16.8B |
| Q4 2025 | 847 | $28.4B |
| Q3 2025 | 905 | $34.9B |
| Q2 2025 | 873 | $34.2B |
| Q1 2025 | 858 | $33.9B |
| Q4 2024 | 805 | $28.9B |
| Q3 2024 | 773 | $30.0B |
| Q2 2024 | 767 | $29.3B |
| Q1 2024 | 767 | $38.4B |
| Q4 2023 | 737 | $34.4B |
| Q3 2023 | 690 | $30.1B |
| Q2 2023 | 714 | $35.5B |
| Q1 2023 | 692 | $26.7B |
| Q4 2022 | 704 | $30.4B |
| Q3 2022 | 634 | $28.0B |
| Q2 2022 | 591 | $23.0B |
| Q1 2022 | 589 | $25.2B |
| Q4 2021 | 633 | $29.6B |
| Q3 2021 | 594 | $32.3B |
| Q2 2021 | 607 | $31.1B |
| Q1 2021 | 593 | $31.2B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Costar Group, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Verdence Capital Advisors LLC | 43,924 | $1.77M | 0.10% | +19,154+77.3% | Added |
| Federation des caisses Desjardins du Quebec | 44,041 | $1.78M | 0.01% | +29,099+194.7% | Added |
| Numerai GP LLC | 44,219 | $1.78M | 0.18% | +14,084+46.7% | Added |
| Mutual of America Capital Management LLC | 45,078 | $1.82M | 0.02% | −14,501−24.3% | Reduced |
| National Bank of Canada | 45,497 | $1.84M | 0.00% | −308,118−87.1% | Reduced |
| Robeco Institutional Asset Management B.V. | 46,018 | $1.86M | 0.00% | −22,137−32.5% | Reduced |
| Capital Fund Management S.A. | 46,353 | $1.87M | 0.02% | +46,353 | New |
| Hahn Capital Management LLC | 46,447 | $1.87M | 1.18% | −9,401−16.8% | Reduced |
| Pacer Advisors, Inc. | 47,092 | $1.90M | 0.01% | −17,238−26.8% | Reduced |
| Mercer Global Advisors Inc | 47,777 | $1.93M | 0.00% | +18,772+64.7% | Added |
| Brinker Capital Investments, LLC | 48,446 | $1.95M | 0.02% | +23,725+96.0% | Added |
| Oregon Public Employees Retirement Fund | 48,524 | $1.96M | 0.03% | 00.0% | Unchanged |
| Shelton Capital Management | 48,672 | $1.96M | 0.04% | −91−0.2% | Reduced |
| Swiss Life Asset Management Ltd | 48,719 | $1.97M | 0.01% | +9,544+24.4% | Added |
| Wellington Management Group LLP | 48,913 | $1.97M | 0.00% | −4,755−8.9% | Reduced |
| Louisiana State Employees Retirement System | 49,200 | $1.98M | 0.03% | −800−1.6% | Reduced |
| CWM, LLC | 49,740 | $2.01M | 0.01% | +29,023+140.1% | Added |
| iA Global Asset Management Inc. | 50,393 | $2.03M | 0.03% | −2,287−4.3% | Reduced |
| Truist Financial Corp | 51,118 | $2.06M | 0.00% | −31,120−37.8% | Reduced |
| Captrust Financial Advisors | 51,351 | $2.07M | 0.00% | +18,117+54.5% | Added |
| Sequoia Financial Advisors, LLC | 51,688 | $2.09M | 0.01% | +2,324+4.7% | Added |
| Itau Unibanco Holding S.A. | 52,539 | $2.12M | 0.05% | −35,148−40.1% | Reduced |
| UniSuper Management Pty Ltd | 53,667 | $2.16M | 0.01% | +7,023+15.1% | Added |
| North Star Asset Management Inc | 54,422 | $2.20M | 0.10% | +15,920+41.3% | Added |
| Allianz SE | 56,052 | $2.26M | 0.03% | 00.0% | Unchanged |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 57,483 | $2.32M | 0.02% | −14,107−19.7% | Reduced |
| Americana Partners, LLC | 57,568 | $2.32M | 0.06% | +50,190+680.3% | Added |
| British Columbia Investment Management Corp | 58,402 | $2.36M | 0.01% | −16,736−22.3% | Reduced |
| New York Life Investment Management LLC | 58,686 | $2.37M | 0.02% | +762+1.3% | Added |
| Ivy Lane Capital Management, LLC | 59,000 | $2.38M | 3.60% | +59,000 | New |
| US Bancorp | 59,293 | $2.39M | 0.00% | −5,192−8.1% | Reduced |
| Neuberger Berman Group LLC | 61,102 | $2.46M | 0.00% | −108,565−64.0% | Reduced |
| American Century Companies Inc | 61,958 | $2.50M | 0.00% | −14,637−19.1% | Reduced |
| Employees Retirement System of Texas | 63,224 | $2.55M | 0.02% | 00.0% | Unchanged |
| Police & Firemen's Retirement System of New Jersey | 64,132 | $2.59M | 0.02% | +275+0.4% | Added |
| Buttonwood Financial Advisors Inc. | 64,632 | $2.61M | 0.87% | +57,551+812.8% | Added |
| Man Group plc | 64,729 | $2.61M | 0.01% | −160,524−71.3% | Reduced |
| Linden Thomas Advisory Services, LLC | 66,059 | $2.66M | 0.26% | +25,249+61.9% | Added |
| HB Wealth Management, LLC | 66,457 | $2.68M | 0.02% | −7,347−10.0% | Reduced |
| Utah Retirement Systems | 67,788 | $2.73M | 0.03% | −1,127−1.6% | Reduced |
| Tower Research Capital LLC (TRC) | 70,016 | $2.82M | 0.07% | +41,796+148.1% | Added |
| CWM Advisors, LLC | 70,345 | $2.84M | 0.17% | +26,873+61.8% | Added |
| Havemeyer Place LP | 71,065 | $2.87M | 0.33% | +67,840+2,103.6% | Added |
| Blue Zone Wealth Advisors, LLC | 71,468 | $2.88M | 0.59% | −88−0.1% | Reduced |
| Quantitative Investment Management, LLC | 71,716 | $2.89M | 0.30% | +35,967+100.6% | Added |
| Walleye Trading LLC | 72,509 | $2.93M | 0.06% | +60,518+504.7% | Added |
| Trexquant Investment LP | 73,067 | $2.95M | 0.02% | +73,067 | New |
| Vanderbilt University | 73,753 | $2.98M | 0.57% | −53,507−42.0% | Reduced |
| Edgestream Partners, L.P. | 74,431 | $3.00M | 0.10% | +58,626+370.9% | Added |
| Xponance, Inc. | 76,531 | $3.09M | 0.02% | +9,328+13.9% | Added |
| Platinum Investment Management Ltd | 77,500 | $3.13M | 0.79% | +12,500+19.2% | Added |
| ICICI Prudential Asset Management Co Ltd | 77,557 | $3.13M | 0.38% | +70,756+1,040.4% | Added |
| USS Investment Management Ltd | 78,020 | $3.14M | 0.01% | +3,398+4.6% | Added |
| CI Private Wealth, LLC | 79,401 | $3.16M | 0.00% | −7,599−8.7% | Reduced |
| Amalgamated Bank | 78,350 | $3.16M | 0.02% | −1,473−1.8% | Reduced |
| Mirova | 78,550 | $3.17M | 0.13% | +78,550 | New |
| MML Investors Services, LLC | 80,237 | $3.24M | 0.01% | −12,040−13.0% | Reduced |
| Fifth Third Bancorp | 80,738 | $3.26M | 0.01% | +72,872+926.4% | Added |
| STRS Ohio | 80,988 | $3.27M | 0.01% | −150.0% | Reduced |
| Solidarilty Wealth, LLC | 81,303 | $3.28M | 0.63% | +20,634+34.0% | Added |
| Atria Investments LLC | 81,821 | $3.30M | 0.04% | +41,024+100.6% | Added |
| Woodline Partners LP | 83,013 | $3.35M | 0.01% | +10,704+14.8% | Added |
| SEB Asset Management AB | 83,393 | $3.36M | 0.01% | +83,393 | New |
| Caxton Associates LLP | 83,948 | $3.39M | 0.08% | +83,948 | New |
| Exchange Traded Concepts, LLC | 84,449 | $3.41M | 0.03% | +17,552+26.2% | Added |
| Voya Investment Management LLC | 84,543 | $3.41M | 0.00% | −140−0.2% | Reduced |
| The PNC Financial Services Group, Inc. | 84,690 | $3.42M | 0.00% | +8,437+11.1% | Added |
| Oak Thistle LLC | 84,867 | $3.42M | 0.33% | +64,553+317.8% | Added |
| IFM Investors Pty Ltd | 85,669 | $3.46M | 0.03% | +2,711+3.3% | Added |
| Nordea Investment Management AB | 87,230 | $3.48M | 0.00% | +42,655+95.7% | Added |
| GF Fund Management Co. Ltd. | 86,853 | $3.50M | 0.06% | −2,546−2.8% | Reduced |
| DnB Asset Management AS | 88,222 | $3.56M | 0.01% | +3,015+3.5% | Added |
| Guggenheim Capital LLC | 88,384 | $3.57M | 0.03% | −20,462−18.8% | Reduced |
| Rakuten Investment Management, Inc. | 88,316 | $3.61M | 0.01% | +9,694+12.3% | Added |
| Retirement Systems of Alabama | 90,000 | $3.63M | 0.01% | −161−0.2% | Reduced |
| Gilder Gagnon Howe & Co LLC | 91,094 | $3.67M | 0.04% | −148,940−62.0% | Reduced |
| KBC Group NV | 91,783 | $3.70M | 0.01% | −1,752−1.9% | Reduced |
| Holocene Advisors, LP | 92,988 | $3.75M | 0.01% | +92,988 | New |
| Bank of Nova Scotia | 94,485 | $3.81M | 0.01% | +13,450+16.6% | Added |
| Boston Private Wealth LLC | 96,060 | $3.88M | 0.26% | +29,650+44.6% | Added |
| Creative Planning | 97,231 | $3.92M | 0.00% | +42,741+78.4% | Added |
| Swedbank AB | 98,881 | $3.99M | 0.00% | −204,324−67.4% | Reduced |
| Ieq Capital, LLC | 99,244 | $4.00M | 0.02% | +84,674+581.2% | Added |
| MetLife Investment Management | 101,261 | $4.08M | 0.02% | −2,729−2.6% | Reduced |
| Winton Group Ltd | 101,423 | $4.09M | 0.14% | +101,423 | New |
| Ashford Capital Management Inc | 102,490 | $4.13M | 0.51% | −145,469−58.7% | Reduced |
| Dash Acquisitions Inc. | 104,377 | $4.18M | 0.87% | +15,608+17.6% | Added |
| Abn Amro Investment Solutions | 103,876 | $4.19M | 0.05% | −468−0.4% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 107,678 | $4.34M | 0.01% | +107,678 | New |
| Night Owl Capital Management, LLC | 109,244 | $4.41M | 0.51% | +629+0.6% | Added |
| Mariner, LLC | 109,539 | $4.42M | 0.01% | +61,522+128.1% | Added |
| State of Tennessee, Treasury Department | 114,343 | $4.61M | 0.02% | −2,154−1.8% | Reduced |
| Arizona State Retirement System | 115,162 | $4.65M | 0.03% | −1,263−1.1% | Reduced |
| Czech National Bank | 115,426 | $4.66M | 0.03% | +3,671+3.3% | Added |
| State of Michigan Retirement System | 116,500 | $4.70M | 0.02% | −300−0.3% | Reduced |
| Nissay Asset Management Corp | 117,937 | $4.76M | 0.03% | +2,995+2.6% | Added |
| LPL Financial LLC | 118,841 | $4.79M | 0.00% | +1,393+1.2% | Added |
| Landmark Investment Partners, L.P. | 119,966 | $4.84M | 5.00% | −34,514−22.3% | Reduced |
| Public Sector Pension Investment Board | 120,605 | $4.87M | 0.02% | +12,696+11.8% | Added |
| Handelsbanken Fonder AB | 121,880 | $4.92M | 0.02% | +3,383+2.9% | Added |